Stefan, Can you try doing a ldd on the paraview executable. Is in statically linking OpenGl? I wonder if brings in different implementations if that happens.
Utkarsh On Thu, May 31, 2012 at 11:40 PM, Stefan Melber <[email protected]> wrote: > Hi, > > > i noticed an behavior of VTK, which i cant explain at the moment. Maybe, > someone found the same effect and has some thoughts ... > > Ok - what was done: > > o compiling ParaView 3.14.1 with QT 4.6.2 on a 64bit linux box > o comparing the Version without and with shared libs (BUILD_SHARED off and > on) > o starting ParaView and have a look on the loading time / the time for the > first interaction (e.g. clicking on load-button) > o measure the loading time of an complex case and the time for the rendering > after a rotation of the (complex) model on the screen > o measurements done with TimerLog of ParaView > > What i found was: > > | static | shared > ===================================== > GUI | ok | slow > Load | 7.139 sec. | 11.47 sec. > Rotate | 0.088 sec. | 0.029 sec. > > The slow GUI response (approx. 3-5 secs) of the shared variant is clear > because of the loading time of all libs. The same holds for the "Load" - > however - why is the render time after a rotation more then two times faster > as for the static case? > > Further on, these test above was done on a linux box with Quadro4000 > graphics card, 295.33 NVidia driver, SLED-Linux with 3.0.13er kernel and > Xorg 7.4. > > Now, i did the same tests on the same linux box, but with OpenSuse 12.1, > 3.1.10er kernel and Xorg 7.6 and got > > | static | shared > ===================================== > GUI | ok | ok > Load | 7.279 sec. | 11.28 sec. > Rotate | 0.5 sec. | 0.028 sec. > > Thats now really interesting: In both cases (static and shared) now the GUI > is fast - why - i dont know. The Loading time is comparable to SLED - but > the render time of the static case is now about 6 times slower then with > SLED?! And - it has some unsteady delays in the redraw. The shared variant > is ok and again faster then the static one... > > Any ideas why the rendering is faster with shared libs?! > > Best regards and thank you, > > Stefan > > > > > > > > =============================================================== > > _/ Stefan Melber-Wilkending > _/_/ ------------------------ > _/ _/ > _/_/_/_/_/_/_/_/_/_/ German Aerospace Center > _/ _/ _/ _/ -- DLR -- > _/ _/ _/ _/ Member of the > _/_/_/_/_/_/_/_/_/_/ Helmholtz-Association > _/ _/ _ _ > _/_/ | \ | |_| Institute of Aerodynamics > _/ |_/ |_ | \ and Flow Technology > Transport Aircraft Branch > > Fields of activities: Lilienthalplatz 7 > o High-Lift Research D-38108 Braunschweig/Germany > o Complex Configurations > o Numerical Wind-Tunnel Phone ..: +49 531/295-2836 > o Wind-Tunnel Design Fax. ...: +49 531/295-2914 > o Supercomputing > o Visualization Techniques Email ..: [email protected] > o Glider-Aerodynamics Web ....: http://www.dlr.de/AS > > =============================================================== > > > _______________________________________________ > Powered by www.kitware.com > > Visit other Kitware open-source projects at > http://www.kitware.com/opensource/opensource.html > > Please keep messages on-topic and check the ParaView Wiki at: > http://paraview.org/Wiki/ParaView > > Follow this link to subscribe/unsubscribe: > http://www.paraview.org/mailman/listinfo/paraview > _______________________________________________ Powered by www.kitware.com Visit other Kitware open-source projects at http://www.kitware.com/opensource/opensource.html Please keep messages on-topic and check the ParaView Wiki at: http://paraview.org/Wiki/ParaView Follow this link to subscribe/unsubscribe: http://www.paraview.org/mailman/listinfo/paraview
